FWIW: I've sold and used thousands of MSD distributors. Not a single problem. Internals will rust if your in a humid climate. A person I know had a weird problem, found out the two plug wires were switched. Ran.....not well until he fixed that. Be on the look out.

A racer at our track somehow did that recently....not sure how, but they did.

I've had a brand new, from Jegs, MSD crank trigger extension cable wired backwards. Called MSD and sent photo. They said, "never seen that before" and told me to swap the wires. I wonder if that is the first response they are taught in tech school........
Dan

You must be very careful when buying MSD stuff nowadays! There are quite a few Chinese knock offs being sold as the real thing on the interwebs! They are junk! Buy direct or from a reputable dealer. Posting for a friend who found out the hard way. Jim